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Finding the Fourth Proportional to 371,386.64, 512,515.67 and 218,431.28

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Solution

The fourth proportional to 371,386.64, 512,515.67 and 218,431.28 is: 301,436.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    371,386.64 : 512,515.67 = 218,431.28 : x
  2. Step 2: Convert to fraction form
    371,386.64/512,515.67 = 218,431.28/x
  3. Step 3: Cross multiply
    371,386.64x = 512,515.67 × 218,431.28
  4. Step 4: Simplify right side
    371,386.64x = 111,949,454,007.29
  5. Step 5: Solve for x
    x = 111,949,454,007.29/371,386.64
  6. Step 6: Final answer
    x = 301,436.40

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.